Apologies if you've answered this somewhere else, but since this program runs in conjunction with the FanFictionDowloader plug-in , I've forgotten where I saw the information.
If I'm correct, there is a way to assign a particular scheme/picture to be used with each particular download site. As in, each time I download a story from Archive of Our Own, the Generate Cover plug-in will generate a cover with a particular image.
Thanks in advance.